My vet says 13 is considered elderly for a cat. However, I have just lost a female this month, and she was 22yrs and 39 days old. I have also had Misty who was 24yrs except for 2 days. Monte was 20yrs. Smokey was 18yrs. Mitzi was 13yrs, and Jessica was 14yrs. Katy died aged 2yrs of leukaemia, So there is a wide variation of longevity. Normally, cats have a longer life span than dogs. Present cats are Felix aged 6yrs and Frankie 3yrs, and I'm hoping they have long lives. The oldest UK cat at the moment is a black & white, called Mischief, who is 27yrs old. You can google (Mischief the Cat's 27th Birthday). and see a photo of him. he's gorgeous.